RetroFed Forums

“CP/M, originally standing for Control Program/Monitor and later Control Program for Microcomputers, is a mass-market operating system created in 1974 for Intel 8080/85-based microcomputers by Gary Kildall of Digital Research, Inc. Initially confined to single-tasking on 8-bit processors and no more than 64 kilobytes of memory, later versions of CP/M added multi-user variations and were migrated to 16-bit processors.” – taken from Wikipedia

(link: https://en.wikipedia.org/wiki/CP/M)

Want to learn more? Follow the link: http://www.digitalresearch.biz/CPM.HTM

Of particular note is the web site run by Gaby Chaudry: http://www.gaby.de/ecpm.htm

Another excellent resource is the Unofficial CP/M Web Site (link below) which boasts tons of software and source code that is unable to be distributed otherwise.

(link: http://www.cpm.z80.de/)

Have questions? Need help getting started? Just ask! CP/M 2.2 seems to be the most popular for those still working with / on the system. If not on legacy hardware, SIMH and Oracle’s VirtualBox are good PC emulators to start with.

Interested in an open source CP/M clone? Check out the CP/Mish distribution (link below) headed by David Given.

(link: http://cowlark.com/cpmish/)

Related lemmys:

https://sh.itjust.works/c/emulation
https://sopuli.xyz/c/freedos

Welcome to the nostalgia-filled piefed instance of yesteryear.

Open Registration with Application questionnaire.

If you have a question or comment you can post in !meta@retrofed.com or message @DosDude@retrofed.com or @Die4Ever@retrofed.com

In case of downtime and/or emergency, we will post updates on @DosDude@mastodon.social

Some rules we try to uphold:

Be civil. Bigotry is not welcome. This includes (but is not limited to): transphobia, queerphobia, racism, ageism and ableism. We do not promote hate.
Communities need to be Retro or Retro-adjacent.
Please don't upload pornographic content. (use an external image host for that)

“CP/M, originally standing for Control Program/Monitor and later Control Program for Microcomputers, is a mass-market operating system created in 1974 for Intel 8080/85-based microcomputers by Gary Kildall of Digital Research, Inc. Initially confined to single-tasking on 8-bit processors and no more than 64 kilobytes of memory, later versions of CP/M added multi-user variations and were migrated to 16-bit processors.” – taken from Wikipedia

(link: https://en.wikipedia.org/wiki/CP/M)

Want to learn more? Follow the link: http://www.digitalresearch.biz/CPM.HTM

Of particular note is the web site run by Gaby Chaudry: http://www.gaby.de/ecpm.htm

Another excellent resource is the Unofficial CP/M Web Site (link below) which boasts tons of software and source code that is unable to be distributed otherwise.

(link: http://www.cpm.z80.de/)

Have questions? Need help getting started? Just ask! CP/M 2.2 seems to be the most popular for those still working with / on the system. If not on legacy hardware, SIMH and Oracle’s VirtualBox are good PC emulators to start with.

Interested in an open source CP/M clone? Check out the CP/Mish distribution (link below) headed by David Given.

(link: http://cowlark.com/cpmish/)

Related lemmys:

https://sh.itjust.works/c/emulation
https://sopuli.xyz/c/freedos

“CP/M, originally standing for Control Program/Monitor and later Control Program for Microcomputers, is a mass-market operating system created in 1974 for Intel 8080/85-based microcomputers by Gary Kildall of Digital Research, Inc. Initially confined to single-tasking on 8-bit processors and no more than 64 kilobytes of memory, later versions of CP/M added multi-user variations and were migrated to 16-bit processors.” – taken from Wikipedia

(link: https://en.wikipedia.org/wiki/CP/M)

Want to learn more? Follow the link: http://www.digitalresearch.biz/CPM.HTM

Of particular note is the web site run by Gaby Chaudry: http://www.gaby.de/ecpm.htm

Another excellent resource is the Unofficial CP/M Web Site (link below) which boasts tons of software and source code that is unable to be distributed otherwise.

(link: http://www.cpm.z80.de/)

Have questions? Need help getting started? Just ask! CP/M 2.2 seems to be the most popular for those still working with / on the system. If not on legacy hardware, SIMH and Oracle’s VirtualBox are good PC emulators to start with.

Interested in an open source CP/M clone? Check out the CP/Mish distribution (link below) headed by David Given.

(link: http://cowlark.com/cpmish/)

Related lemmys:

https://sh.itjust.works/c/emulation
https://sopuli.xyz/c/freedos

Welcome to the nostalgia-filled piefed instance of yesteryear.

Open Registration with Application questionnaire.

If you have a question or comment you can post in !meta@retrofed.com or message @DosDude@retrofed.com or @Die4Ever@retrofed.com

In case of downtime and/or emergency, we will post updates on @DosDude@mastodon.social

Some rules we try to uphold:

Be civil. Bigotry is not welcome. This includes (but is not limited to): transphobia, queerphobia, racism, ageism and ableism. We do not promote hate.
Communities need to be Retro or Retro-adjacent.
Please don't upload pornographic content. (use an external image host for that)

	Replies	Author	Score	Last Post
How Much of CP/M’s Design Ended Up in MS‑DOS? (nemanjatrifunovic.substack.com)	0	cm0002	1	Sun Feb 1, 2026 3:33 am »
1982: CP/M-86 for the IBM Personal Computer, Version 1.0 (emulated in your browser) (www.pcjs.org)	1	cm0002	1	Thu Feb 26, 2026 11:58 pm »
How CP/M-86's delay handed Microsoft the keys to the kingdom (www.theregister.com)	0	cm0002	1	Sun Feb 1, 2026 3:32 am »